SET v. Pushpull


I did a search and didn't find any threads on this topic.  I am a newbie to tubes - I have a Tavish Adagio phono stage, and I am looking to add an integrated tube amp into the analog chain in my system - I have never owned one, so my knowledge level is low.  Right now I am running KEF LS50 speakers, but they are a little small for my listening area so possibly looking at larger speakers - I was very impressed by the Joseph Audio Pulsars I recently heard, as one example.

Anyway, most of the integrated tube amps in my price range are seem to be push pull, although the Line Magnetic is SET.  At a high level, I understand the push pull design gives higher output power than SET, but also higher potential for distortion.  

Any practical experience with the pros and cons of each?  And how important is this in the overall scheme, in real world applications?  Say, compared to the choice of output tube?

Thanks,


Tom 
tgr
At 85 dB sensitivity I wouldn't even go with any tube amp, at-least in my case. 

Not sure when people say SET watts are more than SS watts, but watts are watts. It is just that when driving to spec SET distortion is more pleasant then SS. But why listen to distortion (I prefer not to)?.

Pulsars are 83 dB efficient?. Not sure why specs on website does not talk about Pulsars sensitivity?. At least it says impedance does not get lower than 6 ohm that is good.

50 Watts will get you to 95 dB at 8 feet for 83 dB speakers.

If you get a good amp that puts out the watts your speaker needs for your listening needs without breaking a sweat you should not hear a difference. Basically non-existent distortion for all the watts your music needs. This is difficult at loud levels for fair moderately efficient speakers. What I have learned is to not to drive an amp to its spec.

If you want to go in the SET direction then may be pick a speaker that is close to 98 dB or even 100 dB sensitivity?. Then 10 to 20 watts SET will get you there given impedance does not swing. It is a bad idea to pick speaker after choosing an amp, in my limited opinion.

I do own Line Magnetic 508ia and it puts out 48 Watts for a price that is hard to imagine!. It sounds great at moderate levels on 92 dB paradigm studio 40v3 (when compared to Marantz SR7005). It seems it may not be good enough for new set of speakers I got myself, so I am on the fence with this class A tube thing.

If you can do true A/B test of AMPs, after level matching the SPL level,  you should not hear any difference at normal listening levels for good amps SET/Push-pull/Class A/ClassAB or Class D etc.

To claim all types of "good" amps adjusted for level sound the same is ridiculous. A 5 point penalty is charged.
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A nicely restored pair of Dynaco Mk III's will work well with your LS50's. PP 6550's and excellent transformers - 60 + watts from a proven classic design! Competitive in SQ with today's much more expensive tube amps!